Cleaned up many error codes. For any who is filling in error strings into
lldb_private::Error objects the rules are:
- short strings that don't start with a capitol letter unless the name is a
  class or anything else that is always capitolized
- no trailing newline character
- should be one line if possible

Implemented a first pass at adding "--gdb-format" support to anything that
accepts format with optional size/count.

llvm-svn: 142999
diff --git a/lldb/source/Host/common/File.cpp b/lldb/source/Host/common/File.cpp
index fefa343..a12cd3a 100644
--- a/lldb/source/Host/common/File.cpp
+++ b/lldb/source/Host/common/File.cpp
@@ -276,7 +276,7 @@
     char proc[64];
     char path[PATH_MAX];
     if (::snprintf(proc, sizeof(proc), "/proc/self/fd/%d", GetDescriptor()) < 0)
-        error.SetErrorString ("Cannot resolve file descriptor\n");
+        error.SetErrorString ("cannot resolve file descriptor");
     else
     {
         ssize_t len;